A fizzy drink addict who sank a staggering eight litres of cola a day has lost all his teeth - and he's only in his twenties.

Australian hotel hospitality worker William Kennewell ignored repeated warnings from dentists that his fondness for soft drinks would rot his teeth and has now been left with a full set of dentures at the age of 25.

Mr Kennewell's addiction to the sugary drink even left him with blood poisoning.

Addict: William Kennewell has lost all his teeth at the age of 25 because of an addiction to drinking cola

He said: ‘I drank between six and eight litres of soft drink, mostly cola, every day.

‘I’m told a normal person has about 23 teeth, but I only had 13 left and they had to be removed,’ he told The Advertiser newspaper in Adelaide.